The Challenge was launched in June as part of the mayor’s Smarter London Together roadmap, which sets out how he aims to realise his ambition for the capital to become the world’s leading smart city.

Mr Khan said: “Many of London’s advances in the application of data and smart technologies are recognised around the world and I want London to become a global test-bed for civic innovation.

“The fact that our city’s tech community is home to some of the most creative businesses anywhere in the world is something of which we can be really proud. We want London to be the world’s smartest city and these dynamic companies have a crucial role to play.”